A we are the other extream here at Amoco in that I've seen 3590 tapes
     in our 3494 that have 80 GB of user file space... but our biggest
     clients are Oracle DB's and new ones at that... (so a lot of empty
     space for growth)  Currently we have two (2) adsm environments, are
     just days away from our third and only a couple of months away from
     our forth (which will be in Houston) and our fifth (which will be in
     Chicago).  Here in Tulsa our existing 2 contain eleven plus (11+)
     terabytes of data and we haven't even put a dent in our tape storage.
     Our distributed environment project hit the ground running and grew
     MUCH faster than planned.  A few of us here involved in backups kind'a
     guess-duh-mated that and padded our ADSM server requirements and it
     has kept up no problem.  Where other groups have been adding servers
     almost weekly (had a note on a new pair that will have 2 terabytes of
     storage) our initial ADSM servers are keeping up.  The only additions
     we have done would be to increase the number of tape drives in the
     ATL's and that is because we only started with two (2) because we were
     unsure of their performance... but as the above indicates, we are
     happy with them....
     later
          Dwight



______________________________ Reply Separator _________________________________
Subject: Re: MagStar drives and 3494 Library
Author:  ADSM-L (ADSM-L AT VM.MARIST DOT EDU) at unix,mime
Date:    11/18/96 5:38 AM


On Fri, 15 Nov 1996, Bill Koeneman wrote:

We have had a 3495 tape library with 4 MAGSTAR drives attached to a
RS/6000 in operation since April.  With the exception of a problem with
one of the drives which took a while to diagnose, we have been extremely
pleased with the performance and reliability of the units.  We find mount
times consistently under 30 seconds.  We do not get the 30GB estimated
capacity of the tape with compression, more like an average of 10-13GB,
but we back up lots of graphics which are already stored compressed
anyway.  Without any hesitation, I would highly recommend the 3494 and the
MAGSTAR drives.

Ann Slaughter
Library of Congress
Washington, D.C.

The views expressed are my own and may not reflect the views of the
Library.





> MS Mail To:  X400
>
>
> >From Bill Koeneman -- Koch Industries, Wichita Kansas (koenemab AT kochind 
> >DOT com)
>
> We are a prospective ADSM user (RS6000-G40,3494-L12, 2 MagStar Drives) and
> would like to get some feedback on the reliability of both the MagStar
> drives and the 3494 robotics unit. Would like to know user experiences with
> these devices (frequency of problems, time to repair, types of problems,
> shelf life of tapes etc.). Any feedback would be greatly appreciated.
>